New Signature of low mass $Z^\prime$ in $J/ψ$ decays
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| Format: | Preprint |
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2023
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| _version_ | 1866911905818345472 |
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| author | Geng, Chao-Qiang Liu, Chia-Wei Zhang, Jiabao |
| author_facet | Geng, Chao-Qiang Liu, Chia-Wei Zhang, Jiabao |
| contents | We explore a new approach to search for a low-mass $Z^{\prime}$ particle through $J/ψ$ decays by identifying its existence through parity-violating phenomena in the isospin-violating final states of $Λ\overlineΣ^{0}$ and the corresponding charge conjugated states of $\overlineΛΣ^{0}$. Our investigation centers on a generation-independent and leptophobic $Z^{\prime}$ with its mass below 10 GeV. Given the present experimental conditions at the Beijing Spectrometer III~(BESIII) and the anticipated opportunities at the Super Tau Charm Factory~(STCF), we conduct Monte-Carlo simulations to predict possible events at both facilities. Notably, we foresee a substantial enhancement in the precision of the lower limit estimation of $α_{\text{NP}}$ as well as a reduction in statistical uncertainty with upcoming STCF experiments. Furthermore, it is essential to highlight that a null result in the measurement of $α_{\text{NP}}$ would impose stringent constraints, requiring the $Z^{\prime}-q-q$ couplings to be on the order of $10^{-2}$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2309_11066 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | New Signature of low mass $Z^\prime$ in $J/ψ$ decays Geng, Chao-Qiang Liu, Chia-Wei Zhang, Jiabao High Energy Physics - Phenomenology High Energy Physics - Experiment We explore a new approach to search for a low-mass $Z^{\prime}$ particle through $J/ψ$ decays by identifying its existence through parity-violating phenomena in the isospin-violating final states of $Λ\overlineΣ^{0}$ and the corresponding charge conjugated states of $\overlineΛΣ^{0}$. Our investigation centers on a generation-independent and leptophobic $Z^{\prime}$ with its mass below 10 GeV. Given the present experimental conditions at the Beijing Spectrometer III~(BESIII) and the anticipated opportunities at the Super Tau Charm Factory~(STCF), we conduct Monte-Carlo simulations to predict possible events at both facilities. Notably, we foresee a substantial enhancement in the precision of the lower limit estimation of $α_{\text{NP}}$ as well as a reduction in statistical uncertainty with upcoming STCF experiments. Furthermore, it is essential to highlight that a null result in the measurement of $α_{\text{NP}}$ would impose stringent constraints, requiring the $Z^{\prime}-q-q$ couplings to be on the order of $10^{-2}$. |
| title | New Signature of low mass $Z^\prime$ in $J/ψ$ decays |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2309.11066 |